Electric power controller for vehicle mounting
a technology for electric power controllers and vehicles, applied in safety/protection circuits, instruments, transportation and packaging, etc., can solve the problems of reducing the protection ability of batteries, affecting the performance of electric power controllers, and affecting the battery li
Inactive Publication Date: 2007-11-01
OMRON AUTOMOTIVE ELECTRONICS CO LTD
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Benefits of technology
"The present invention provides an electric power controller for vehicles that can adaptively set a judging reference voltage for interrupting a load electric current and flexibly cope with changes in the load, harness, and other factors. The controller includes voltage drop detecting means for detecting voltage drops in the harness, electric current detecting means for detecting the electric current flowed to the load, resistance value arithmetic means for calculating the resistance value of the harness, and correction voltage arithmetic means for calculating a correction voltage based on the resistance value and the electric current flowed to the load. The controller can also set the threshold value based on the voltage drop amount of the harness, the resistance value of the harness, or the predetermined upper limit resistance value to protect the battery from abnormal situations."
Problems solved by technology
Therefore, a burden on the battery is large.
The battery burden is also large when such a domestic appliance is used.
However, in the former electric power controller for vehicle mounting, there are the following problems since the threshold value SL is set to a fixed value set in advance.
However, fixed Ref causes incongruence for the following reasons.
Therefore, the trouble that protecting ability of the battery is reduced by the voltage α and the battery rise is easily generated is finally caused.
Accordingly, in this case, a protecting function of the battery 1 is early fulfilled by the voltage α. Therefore, the trouble that performance (charging state) of the battery 1 is sufficient, but no load 6 can be used is caused.
Method used
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[0035] An embodiment mode of the present invention will next be explained on the basis of the drawings. Illustration of various detailed specific and real examples, numerical values, character series and other symbols in the following explanation is strictly reference for clarifying the idea of the present invention. It is clear that no idea of the present invention is limited by all or one portion of these examples, etc. Further, with respect to a publicly known technique, a publicly known procedure, a publicly known architecture, a publicly known circuit construction, etc. (hereinafter called “publicly known matters”), an explanation over its detailed portions is avoided to clarify the explanation, and all or one portion of these publicly known matters is not intentionally excluded. Such publicly known matters can be known by a person skilled in the art at an application time point of the present invention, and are therefore naturally included in the following explanation.
[0036]F...
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In an electric power controller for vehicle mounting, an input voltage supplied through a harness and a threshold value are compared, and the input voltage applied to load is interrupted when the input voltage is smaller than the threshold value. The electric power controller for vehicle mounting includes a voltage drop detector for detecting a voltage drop amount of the harness; and a threshold value setting device in which a voltage provided by subtracting the voltage drop amount of the harness from a predetermined protecting voltage is set as the threshold value.
Description
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an electric power controller for vehicle mounting, and particularly relates to a device for controlling electric power supply to load of large consumed electric power, especially, an electric power controller for vehicle mounting having a preventing function of a battery rise. [0003] 2. Description of the Related Art [0004] In various electric mounting products mounted to a vehicle, considerably large electric power is consumed in e.g., an audio system of large output and a front illuminating light of a xenon system, etc. Therefore, a burden on the battery is large. Further, a commercial electric power converter (a machine for converting a battery voltage into commercial electric power of AC100V) able to use a domestic appliance such as television, etc. is also arranged in accordance with vehicles. The battery burden is also large when such a domestic appliance is used. [0005] Theref...
Claims
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IPC IPC(8): G01R31/28
CPCH02J7/1438Y02T10/7005H02J7/1461Y02T10/70H02J7/0047H02J7/0029
Inventor IMAMURA, KIMIHIKOOKANIWA, MASAKAZU
Owner OMRON AUTOMOTIVE ELECTRONICS CO LTD